Video Source To become a fleet service mechanic, you have to understand how a diesel engine works. In this article, we will break down the basics of diesel engines and how they operate. The operating cycle of the diesel engine begins when the engine cylinders draw in clean air, as opposed to the fuel-air mixture that conventional gasoline engines use. The piston drives up very quickly, compressing the air and rapidly raising its temperature. The fuel injector then injects the fuel at high pressure. The fuel enters the engine as a fine spray and is vaporized in the hot air. Spontaneous combustion occurs to light the fuel. Conventional gasoline engines…